Restore RazorCompiler EA layer for desktop (#73697)

* Restore RazorCompiler EA layer for desktop * Fix nuget * Tests * Apply suggestions from code review Co-authored-by: Jan Jones <[email protected]> * Apply suggestions from code review Co-authored-by: Jan Jones <[email protected]> --------- Co-authored-by: Jan Jones <[email protected]>
dotnet · May 30, 2024 · 2ab34d5 · 2ab34d5
1 parent 2b7d172
commit 2ab34d5
Show file tree

Hide file tree

Showing 27 changed files with 373 additions and 1 deletion.
diff --git a/.github/CODEOWNERS b/.github/CODEOWNERS
@@ -45,4 +45,5 @@ src/Features/**/PublicAPI.Unshipped.txt @dotnet/roslyn-api-owners
 src/EditorFeatures/**/PublicAPI.Unshipped.txt @dotnet/roslyn-api-owners
 
 src/Tools/ExternalAccess/OmniSharp*/ @333fred @dibarbet
+src/Tools/ExternalAccess/RazorCompiler*/ @dotnet/roslyn-compiler
 src/Tools/ExternalAccess/CompilerDeveloperSDK/ @333fred
diff --git a/Compilers.slnf b/Compilers.slnf
@@ -67,6 +67,8 @@
       "src\\Tools\\BuildBoss\\BuildBoss.csproj",
       "src\\Tools\\Replay\\Replay.csproj",
       "src\\Tools\\BuildValidator\\BuildValidator.csproj",
+      "src\\Tools\\ExternalAccess\\RazorCompilerTest\\Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.UnitTests.csproj",
+      "src\\Tools\\ExternalAccess\\RazorCompiler\\Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.csproj",
       "src\\Tools\\PrepareTests\\PrepareTests.csproj",
       "src\\Tools\\Source\\CompilerGeneratorTools\\Source\\BoundTreeGenerator\\CompilersBoundTreeGenerator.csproj",
       "src\\Tools\\Source\\CompilerGeneratorTools\\Source\\CSharpErrorFactsGenerator\\CSharpErrorFactsGenerator.csproj",

diff --git a/Roslyn.sln b/Roslyn.sln
@@ -504,6 +504,10 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.CodeAnalysis.Test
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "TestDiscoveryWorker", "src\Tools\TestDiscoveryWorker\TestDiscoveryWorker.csproj", "{8BC50AFF-1EBF-4E9A-AEBB-04F387AA800F}"
 EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler", "src\Tools\ExternalAccess\RazorCompiler\Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.csproj", "{E5E0BF73-95F7-4BC3-8443-2336C4FF4297}"
+EndProject
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.UnitTests", "src\Tools\ExternalAccess\RazorCompilerTest\Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.UnitTests.csproj", "{828FD0DB-9927-42AC-B6C2-D1514965D6C3}"
+EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.CodeAnalysis.LanguageServer", "src\Features\LanguageServer\Microsoft.CodeAnalysis.LanguageServer\Microsoft.CodeAnalysis.LanguageServer.csproj", "{2A3C94F7-5B5E-4CDC-B645-672815E61DEB}"
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Microsoft.CodeAnalysis.LanguageServer.UnitTests", "src\Features\LanguageServer\Microsoft.CodeAnalysis.LanguageServer.UnitTests\Microsoft.CodeAnalysis.LanguageServer.UnitTests.csproj", "{9A90AA02-4275-40ED-B1F1-731AF17E675C}"
@@ -1282,6 +1286,14 @@ Global
 		{8BC50AFF-1EBF-4E9A-AEBB-04F387AA800F}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{8BC50AFF-1EBF-4E9A-AEBB-04F387AA800F}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{8BC50AFF-1EBF-4E9A-AEBB-04F387AA800F}.Release|Any CPU.Build.0 = Release|Any CPU
+		{E5E0BF73-95F7-4BC3-8443-2336C4FF4297}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{E5E0BF73-95F7-4BC3-8443-2336C4FF4297}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{E5E0BF73-95F7-4BC3-8443-2336C4FF4297}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{E5E0BF73-95F7-4BC3-8443-2336C4FF4297}.Release|Any CPU.Build.0 = Release|Any CPU
+		{828FD0DB-9927-42AC-B6C2-D1514965D6C3}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{828FD0DB-9927-42AC-B6C2-D1514965D6C3}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{828FD0DB-9927-42AC-B6C2-D1514965D6C3}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{828FD0DB-9927-42AC-B6C2-D1514965D6C3}.Release|Any CPU.Build.0 = Release|Any CPU
 		{2A3C94F7-5B5E-4CDC-B645-672815E61DEB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{2A3C94F7-5B5E-4CDC-B645-672815E61DEB}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{2A3C94F7-5B5E-4CDC-B645-672815E61DEB}.Release|Any CPU.ActiveCfg = Release|Any CPU
@@ -1600,6 +1612,8 @@ Global
 		{58AD1B2C-6FFC-47CB-838A-54D0CA2BF0C8} = {D449D505-CC6A-4E0B-AF1B-976E2D0AE67A}
 		{8A29449D-411E-49E4-B99E-E8428076BB21} = {55A62CFA-1155-46F1-ADF3-BEEE51B58AB5}
 		{8BC50AFF-1EBF-4E9A-AEBB-04F387AA800F} = {FD0FAF5F-1DED-485C-99FA-84B97F3A8EEC}
+		{E5E0BF73-95F7-4BC3-8443-2336C4FF4297} = {8977A560-45C2-4EC2-A849-97335B382C74}
+		{828FD0DB-9927-42AC-B6C2-D1514965D6C3} = {8977A560-45C2-4EC2-A849-97335B382C74}
 		{2A3C94F7-5B5E-4CDC-B645-672815E61DEB} = {D449D505-CC6A-4E0B-AF1B-976E2D0AE67A}
 		{9A90AA02-4275-40ED-B1F1-731AF17E675C} = {D449D505-CC6A-4E0B-AF1B-976E2D0AE67A}
 		{521ADC3E-CC15-414B-9356-D87C5BCF3A24} = {C52D8057-43AF-40E6-A01B-6CDBB7301985}

diff --git a/src/Compilers/CSharp/csc/CscCommandLine.projitems b/src/Compilers/CSharp/csc/CscCommandLine.projitems
@@ -36,6 +36,7 @@
 
     <ProjectReference Include="$(MSBuildThisFileDirectory)..\..\Core\Portable\Microsoft.CodeAnalysis.csproj" />
     <ProjectReference Include="$(MSBuildThisFileDirectory)..\Portable\Microsoft.CodeAnalysis.CSharp.csproj" />
+    <ProjectReference Include="$(MSBuildThisFileDirectory)..\..\..\Tools\ExternalAccess\RazorCompiler\Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.csproj" />
     <PackageReference Include="System.IO.Pipes.AccessControl" Version="$(SystemIOPipesAccessControlVersion)" Condition="'$(TargetFramework)' == 'net6.0'" />
   </ItemGroup>
   <ItemGroup Condition="'$(DefaultLanguageSourceExtension)' != '' AND '$(BuildingInsideVisualStudio)' != 'true'">

diff --git a/src/Compilers/Core/CodeAnalysisTest/AnalyzerAssemblyLoaderTests.cs b/src/Compilers/Core/CodeAnalysisTest/AnalyzerAssemblyLoaderTests.cs
@@ -519,6 +519,80 @@ public void AssemblyLoading_DependencyInDifferentDirectory(AnalyzerTestKind kind
             });
         }
 
+#if NET472
+        /// <summary>
+        /// Verify that MS.CA.EA.RazorCompiler will be loaded from the compiler directory not the 
+        /// analyzer directory.
+        /// </summary>
+        [Theory]
+        [CombinatorialData]
+        public void AssemblyLoading_RazorCompiler1(AnalyzerTestKind kind)
+        {
+            Run(kind, static (AnalyzerAssemblyLoader loader, AssemblyLoadTestFixture testFixture) =>
+            {
+                using var temp = new TempRoot();
+                var tempDir = temp.CreateDirectory();
+
+                var externalAccessRazorPath = typeof(Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.GeneratorExtensions).Assembly.Location;
+                var alternatePath = tempDir.CreateDirectory("a").CreateFile("Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.dll").CopyContentFrom(externalAccessRazorPath).Path;
+
+                loader.AddDependencyLocation(alternatePath);
+                Assembly assembly = loader.LoadFromPath(alternatePath);
+
+                Assert.Equal(externalAccessRazorPath, assembly.Location);
+
+                // Even though EA.RazorCompiler is loaded from the compiler directory the shadow copy loader
+                // still does a defensive copy.
+                var copyCount = loader is ShadowCopyAnalyzerAssemblyLoader
+                    ? 1
+                    : (int?)null;
+
+                VerifyDependencyAssemblies(
+                    loader,
+                    copyCount: copyCount,
+                    []);
+            });
+        }
+
+        /// <summary>
+        /// Verify that MS.CA.EA.RazorCompiler will be loaded from the compiler directory not the 
+        /// analyzer directory.
+        /// </summary>
+        [Theory]
+        [CombinatorialData]
+        public void AssemblyLoading_RazorCompiler2(AnalyzerTestKind kind)
+        {
+            Run(kind, static (AnalyzerAssemblyLoader loader, AssemblyLoadTestFixture testFixture) =>
+            {
+                using var temp = new TempRoot();
+                var tempDir = temp.CreateDirectory();
+
+                var externalAccessRazorPath = typeof(Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.GeneratorExtensions).Assembly.Location;
+                var dir = tempDir.CreateDirectory("a");
+                var alternatePath = dir.CreateFile("Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.dll").CopyContentFrom(externalAccessRazorPath).Path;
+                var deltaFile = dir.CreateFile("Delta.dll").CopyContentFrom(testFixture.Delta1).Path;
+
+                loader.AddDependencyLocation(alternatePath);
+                loader.AddDependencyLocation(deltaFile);
+                Assembly razorAssembly = loader.LoadFromPath(alternatePath);
+                _ = loader.LoadFromPath(deltaFile);
+
+                Assert.Equal(externalAccessRazorPath, razorAssembly.Location);
+
+                // Even though EA.RazorCompiler is loaded from the compiler directory the shadow copy loader
+                // still does a defensive copy.
+                var copyCount = loader is ShadowCopyAnalyzerAssemblyLoader
+                    ? 2
+                    : (int?)null;
+                VerifyDependencyAssemblies(
+                    loader,
+                    copyCount: copyCount,
+                    deltaFile);
+            });
+        }
+
+#endif
+
         /// <summary>
         /// Similar to <see cref="AssemblyLoading_DependencyInDifferentDirectory"/> except want to validate
         /// a dependency in the same directory is preferred over one in a different directory.

diff --git a/src/Compilers/Core/CodeAnalysisTest/Microsoft.CodeAnalysis.UnitTests.csproj b/src/Compilers/Core/CodeAnalysisTest/Microsoft.CodeAnalysis.UnitTests.csproj
@@ -23,6 +23,7 @@
     <ProjectReference Include="..\..\Test\Utilities\VisualBasic\Microsoft.CodeAnalysis.VisualBasic.Test.Utilities.vbproj" />
     <ProjectReference Include="..\..\VisualBasic\Portable\Microsoft.CodeAnalysis.VisualBasic.vbproj" />
     <ProjectReference Include="..\Portable\Microsoft.CodeAnalysis.csproj" />
+    <ProjectReference Include="..\..\..\Tools\ExternalAccess\RazorCompiler\Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.csproj" Condition="'$(TargetFramework)' == 'net472'" />
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Moq" />

diff --git a/src/Compilers/Server/VBCSCompiler/VBCSCompilerCommandLine.projitems b/src/Compilers/Server/VBCSCompiler/VBCSCompilerCommandLine.projitems
@@ -56,6 +56,7 @@
     <ProjectReference Include="$(MSBuildThisFileDirectory)..\..\CSharp\Portable\Microsoft.CodeAnalysis.CSharp.csproj" />
     <ProjectReference Include="$(MSBuildThisFileDirectory)..\..\VisualBasic\Portable\Microsoft.CodeAnalysis.VisualBasic.vbproj" />
     <ProjectReference Include="$(MSBuildThisFileDirectory)..\..\Core\Portable\Microsoft.CodeAnalysis.csproj" />
+    <ProjectReference Include="$(MSBuildThisFileDirectory)..\..\..\Tools\ExternalAccess\RazorCompiler\Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.csproj" />
 
     <Reference Include="System.Configuration" Condition="'$(TargetFramework)' == 'net472'" />
 

diff --git a/src/Compilers/Test/Core/Microsoft.CodeAnalysis.Test.Utilities.csproj b/src/Compilers/Test/Core/Microsoft.CodeAnalysis.Test.Utilities.csproj
@@ -66,6 +66,7 @@
     <InternalsVisibleTo Include="Microsoft.VisualStudio.LanguageServices.CSharp.UnitTests" />
     <InternalsVisibleTo Include="Microsoft.CodeAnalysis.ExternalAccess.FSharp.UnitTests" />
     <InternalsVisibleTo Include="Microsoft.CodeAnalysis.ExternalAccess.OmniSharp.UnitTests" />
+    <InternalsVisibleTo Include="Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.UnitTests" />
     <InternalsVisibleTo Include="Microsoft.CodeAnalysis.Rebuild.UnitTests" />
     <InternalsVisibleTo Include="Roslyn.Test.PdbUtilities" />
     <InternalsVisibleTo Include="Roslyn.VisualStudio.Next.UnitTests" />

diff --git a/src/Compilers/Test/Utilities/CSharp/Microsoft.CodeAnalysis.CSharp.Test.Utilities.csproj b/src/Compilers/Test/Utilities/CSharp/Microsoft.CodeAnalysis.CSharp.Test.Utilities.csproj
@@ -32,6 +32,7 @@
     <InternalsVisibleTo Include="Microsoft.CodeAnalysis.CSharp.Syntax.UnitTests" />
     <InternalsVisibleTo Include="Microsoft.CodeAnalysis.CSharp.ExpressionEvaluator.ExpressionCompiler.UnitTests" />
     <InternalsVisibleTo Include="Microsoft.CodeAnalysis.ExpressionEvaluator.FunctionResolver.UnitTests" />
+    <InternalsVisibleTo Include="Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.UnitTests" />
     <InternalsVisibleTo Include="InteractiveHost.UnitTests" />
     <InternalsVisibleTo Include="Microsoft.CodeAnalysis.CSharp.Scripting.UnitTests" />
     <InternalsVisibleTo Include="Microsoft.CodeAnalysis.CSharp.Features.UnitTests" />

diff --git a/src/Compilers/VisualBasic/vbc/VbcCommandLine.projitems b/src/Compilers/VisualBasic/vbc/VbcCommandLine.projitems
@@ -36,6 +36,7 @@
 
     <ProjectReference Include="$(MSBuildThisFileDirectory)..\..\Core\Portable\Microsoft.CodeAnalysis.csproj" />
     <ProjectReference Include="$(MSBuildThisFileDirectory)..\Portable\Microsoft.CodeAnalysis.VisualBasic.vbproj" />
+    <ProjectReference Include="$(MSBuildThisFileDirectory)..\..\..\Tools\ExternalAccess\RazorCompiler\Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.csproj" />
     <PackageReference Include="System.IO.Pipes.AccessControl" Version="$(SystemIOPipesAccessControlVersion)" Condition="'$(TargetFramework)' == 'net6.0'" />
   </ItemGroup>
   <ItemGroup Condition="'$(DefaultLanguageSourceExtension)' != '' AND '$(BuildingInsideVisualStudio)' != 'true'">

diff --git a/...Server/Microsoft.CodeAnalysis.LanguageServer/Microsoft.CodeAnalysis.LanguageServer.csproj b/...Server/Microsoft.CodeAnalysis.LanguageServer/Microsoft.CodeAnalysis.LanguageServer.csproj
@@ -69,6 +69,9 @@
     <!-- Dlls we don't directly reference but need to include to build the MEF composition -->
     <ProjectReference Include="..\..\CSharp\Portable\Microsoft.CodeAnalysis.CSharp.Features.csproj" />
 
+    <!-- Not directly referenced but needed for Razor source generators -->
+    <ProjectReference Include="..\..\..\Tools\ExternalAccess\RazorCompiler\Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.csproj" />
+
     <!-- Not directly referenced but needed for Route embedded language features -->
     <ProjectReference Include="..\..\..\Tools\ExternalAccess\AspNetCore\Microsoft.CodeAnalysis.ExternalAccess.AspNetCore.csproj" />
     <ProjectReference Include="..\..\..\Tools\ExternalAccess\Xaml\Microsoft.CodeAnalysis.ExternalAccess.Xaml.csproj" />

diff --git a/...Features/Lsif/Generator/Microsoft.CodeAnalysis.LanguageServerIndexFormat.Generator.csproj b/...Features/Lsif/Generator/Microsoft.CodeAnalysis.LanguageServerIndexFormat.Generator.csproj
@@ -86,6 +86,11 @@
     <ProjectReference Include="..\..\..\Workspaces\VisualBasic\Portable\Microsoft.CodeAnalysis.VisualBasic.Workspaces.vbproj" />
     <ProjectReference Include="..\..\Core\Portable\Microsoft.CodeAnalysis.Features.csproj" />
 
+    <!-- Make sure we include the RazorCompiler ExternalAccess since this needs to be deployed with the compiler for things that might
+         run the Razor generator. We bundle this in the MWorkspaces.MSBuild NuGet package directly, but since we're consuming a project reference
+         rather than a package reference we'll have to include this here. -->
+    <ProjectReference Include="..\..\..\Tools\ExternalAccess\RazorCompiler\Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.csproj" />
+
     <!-- Below is the transitive closure of the project references above to placate BuildBoss. If changes are made above this line,
          please update the stuff here accordingly. -->
     <ProjectReference Include="..\..\..\Compilers\Core\Portable\Microsoft.CodeAnalysis.csproj" />

diff --git a/src/NuGet/Microsoft.Net.Compilers.Toolset/DesktopCompilerArtifacts.targets b/src/NuGet/Microsoft.Net.Compilers.Toolset/DesktopCompilerArtifacts.targets
@@ -33,6 +33,7 @@
       <DesktopCompilerArtifact Include="$(ArtifactsBinDir)Microsoft.CodeAnalysis.Scripting\$(Configuration)\netstandard2.0\Microsoft.CodeAnalysis.Scripting.dll" NgenArchitecture="all" NgenApplication="csi.exe"/>
       <DesktopCompilerArtifact Include="$(ArtifactsBinDir)Microsoft.CodeAnalysis.CSharp.Scripting\$(Configuration)\netstandard2.0\Microsoft.CodeAnalysis.CSharp.Scripting.dll" NgenArchitecture="all" NgenApplication="csi.exe"/>
       <DesktopCompilerArtifact Include="$(ArtifactsBinDir)Microsoft.CodeAnalysis.VisualBasic\$(Configuration)\netstandard2.0\Microsoft.CodeAnalysis.VisualBasic.dll" NgenArchitecture="all" NgenApplication="VBCSCompiler.exe"/>
+      <DesktopCompilerArtifact Include="$(ArtifactsBinDir)Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler\$(Configuration)\netstandard2.0\Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.dll" />
       <DesktopCompilerArtifact Include="$(ArtifactsBinDir)csc$(_ExeDirSuffix)\$(Configuration)\net472\Microsoft.DiaSymReader.Native.amd64.dll" Condition="'$(DotNetBuildFromSource)' != 'true'"/>
       <DesktopCompilerArtifact Include="$(ArtifactsBinDir)csc$(_ExeDirSuffix)\$(Configuration)\net472\Microsoft.DiaSymReader.Native.arm64.dll" Condition="'$(DotNetBuildFromSource)' != 'true'"/>
       <DesktopCompilerArtifact Include="$(ArtifactsBinDir)csc$(_ExeDirSuffix)\$(Configuration)\net472\Microsoft.DiaSymReader.Native.x86.dll" Condition="'$(DotNetBuildFromSource)' != 'true'"/>

diff --git a/src/NuGet/VS.Tools.Roslyn.Package/VS.Tools.Roslyn.Package.csproj b/src/NuGet/VS.Tools.Roslyn.Package/VS.Tools.Roslyn.Package.csproj
@@ -26,6 +26,7 @@
     <ProjectReference Include="..\..\Interactive\csi\csi.csproj" PrivateAssets="all"/>
     <ProjectReference Include="..\..\Compilers\Core\MSBuildTask\Microsoft.Build.Tasks.CodeAnalysis.csproj" PrivateAssets="all"/>
     <ProjectReference Include="..\..\Compilers\Server\VBCSCompiler\AnyCpu\VBCSCompiler.csproj" PrivateAssets="all"/>
+    <ProjectReference Include="..\..\Tools\ExternalAccess\RazorCompiler\Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.csproj" PrivateAssets="all" />
   </ItemGroup>
 
   <Target Name="_GetFilesToPackage" DependsOnTargets="InitializeDesktopCompilerArtifacts">

diff --git a/src/Tools/BuildBoss/CompilerNuGetCheckerUtil.cs b/src/Tools/BuildBoss/CompilerNuGetCheckerUtil.cs
@@ -178,7 +178,9 @@ private bool CheckPackages(TextWriter textWriter)
             allGood &= VerifyPackageCore(
                 textWriter,
                 FindNuGetPackage(Path.Combine(ArtifactsDirectory, "packages", Configuration, "Shipping"), "Microsoft.Net.Compilers.Toolset"),
-                excludeFunc: relativeFileName => relativeFileName.StartsWith(@"tasks\netcore\bincore\Microsoft.DiaSymReader.Native", PathComparison),
+                excludeFunc: relativeFileName =>
+                    relativeFileName.StartsWith(@"tasks\netcore\bincore\Microsoft.DiaSymReader.Native", PathComparison) ||
+                    relativeFileName.StartsWith(@"tasks\netcore\bincore\Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler.dll", PathComparison),
                 (@"tasks\net472", GetProjectOutputDirectory("csc", "net472")),
                 (@"tasks\net472", GetProjectOutputDirectory("vbc", "net472")),
                 (@"tasks\net472", GetProjectOutputDirectory("csi", "net472")),

diff --git a/src/Tools/ExternalAccess/RazorCompiler/GeneratorExtensions.cs b/src/Tools/ExternalAccess/RazorCompiler/GeneratorExtensions.cs
@@ -0,0 +1,34 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using System;
+using System.Collections.Immutable;
+using System.Threading;
+using Microsoft.CodeAnalysis.PooledObjects;
+
+namespace Microsoft.CodeAnalysis.ExternalAccess.RazorCompiler
+{
+    internal static partial class GeneratorExtensions
+    {
+        public static void RegisterHostOutput<TSource>(ref this IncrementalGeneratorInitializationContext @this, IncrementalValuesProvider<TSource> source, Action<HostProductionContext, TSource, CancellationToken> action)
+        {
+            _ = @this;
+            source.Node.RegisterOutput(new HostOutputNode<TSource>(source.Node, action));
+        }
+
+        public static ImmutableArray<(string Key, string Value)> GetHostOutputs(this GeneratorRunResult runResult) => runResult.HostOutputs;
+    }
+
+    internal readonly struct HostProductionContext
+    {
+        internal readonly ArrayBuilder<(string, string)> Outputs;
+
+        internal HostProductionContext(ArrayBuilder<(string, string)> outputs)
+        {
+            Outputs = outputs;
+        }
+
+        public void AddOutput(string name, string value) => Outputs.Add((name, value));
+    }
+}